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Future experimental improvement for the search of lepton-number-violating processes in the eμ sector
Yeo, Beomki,Kuno, Yoshitaka,Lee, MyeongJae,Zuber, Kai American Physical Society 2017 Physical Review D Vol.96 No.7
<P>The conservation of lepton flavor and total lepton number are no longer guaranteed in the Standard Model after the discovery of neutrino oscillations. The mu(-)+ N(A, Z) -> e(+) N(A, Z - 2) conversion in a muonic atom is one of the most promising channels to investigate the lepton number violation processes, and measurement of the mu(-) e(+) conversion is planned in future, mu(-) - e(-) conversion experiments with a muonic atom in a muon-stopping target. This article discusses experimental strategies to maximize the sensitivity of the mu(-) - e(+) conversion experiment by introducing the new requirement of the mass relation of M(A, Z - 2) < M(A, Z - 1), where M(A, Z) is the mass of the muon-stopping target nucleus, to eliminate the backgrounds from radiative muon capture. The sensitivity of the mu(-) - e(+) conversion is expected to be improved by 4 orders of magnitude in forthcoming experiments using a proper target nucleus that satisfies the mass relation. The most promising isotopes found are Ca-40 and S-32.</P>
Injection Study of 6-Sector PRISM-FFAG Using Pulsed Alpha Particles
Takahisa Itahashi,Yasushi Arimoto,Yasutoshi Kuriyama,Makoto Yoshida,Imam Hossain,Shinnya Araki,Akira Sato,Yousuke Eguchi,Yoshihito Nakanishi,Masaharu Aoki,Yoshitaka Kuno,Toshiyuki Oki,Chihiro Ohmori,Y 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.54 No.1
An experiment is proposed to study a novel technique of muon phase rotation for storage rings using pulsed alpha-particle injection from a standard radioactive 241Am source into an ultra-high field gradient RF cavity of a storage ring. The 6-sector PRISM-FFAG ring is specically considered. The specifications of the pulser, in ector and electrodes for guiding the 241Am-source to a sector are described based on simulation studies. The method of RF-particle TOF measurement demonstrates the validity of the proposed method. An experiment is proposed to study a novel technique of muon phase rotation for storage rings using pulsed alpha-particle injection from a standard radioactive 241Am source into an ultra-high field gradient RF cavity of a storage ring. The 6-sector PRISM-FFAG ring is specically considered. The specifications of the pulser, in ector and electrodes for guiding the 241Am-source to a sector are described based on simulation studies. The method of RF-particle TOF measurement demonstrates the validity of the proposed method.